Title: Hashemite, Ba(Cr,S)O4, a new mineral from Jordan
Abstract: Hashemite, Ba(Cr,S)Oa, from west-central Jordan is associated with chromian ettringite, apatite, and calcite in a phosphatic carbonate analogous to the Hatrurim Formation in Israel. The mineral is orthorhombic, Pnma, with a = 9.ll2Q)4, b = 5.541(l)A, c = 7.343fl)4, Z : 4.Itoccurs as small, euhedral, dark-brown, commonly zoned crystals with an averaged D(meas.) : 4.59 g/cm3 and a hardness of 3.5. Hashemite is biaxial (+); refractive indices on light and dark material are: (dark) a : 1.952(2\, F = 1.960(2), y : 1.977(2); (lighQ a: 1.810(2), F: 1.813(2), y: 1.82aQ).2V.(+) varies from 35'to 57o. Microprobe analyses of zoned crystals yield BaO :61.4, CrO3 : 31.3, and SO3 :7.59 summing to 100.00.
Publication Year: 1983
Publication Date: 1983-12-01
Language: en
Type: article
Access and Citation
Cited By Count: 28
AI Researcher Chatbot
Get quick answers to your questions about the article from our AI researcher chatbot